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问题 填空题

一建筑工人用100N的水平推力推小车，使小车在水平地面上匀速前进了15m，小车受到的阻力为_____N．撤去推力，小车仍然能继续向前1m，这是由于小车具有_____．在上述小车前进16m的过程中，建筑工人对小车做的功为_____J．

答案

100；惯性；1500

填空题
从方框中选择正确的单词填空。
useful, visit, traveling, knowledge, second, with, popular, come, but, advantage, other, in, is, to, us, at, least

     First, by __1__ we can enjoy the beautiful scenery (风景) of different places. We can see many places
__2__ our own eyes, which can be read about in books, and __3__ some famous cities and scenic spots.
     __4__, we will meet people with different interests and see strange and different things when we travel. We can get ideas of the conditions and customs of __5__ people, taste different foods and local favors
(最爱)  if we like.  __6__ this way, we can understand how different other people live.
     Third, travel will not only help us gain (获得) __7__ of geography and history and other knowledge,
__8__ also it will help us keep healthy and make us less narrow minded (才智有限的).
     With all these __9__ of travel, it is no wonder that travel has now become more __10__ than ever in
China.
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选择题

下列军事行动按先后顺序排列正确的一组是

①强渡大渡河 ②飞夺泸定桥 ③四渡赤水 ④急渡金沙江[ ]

A．③①④②

B．③④②①

C．③②①④

D．③④①②

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